CVE-2025-68244
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
drm/i915: Avoid lock inversion when pinning to GGTT on CHV/BXT+VTD
On completion of i915_vma_pin_ww(), a synchronous variant of dma_fence_work_commit() is called. When pinning a VMA to GGTT address space on a Cherry View family processor, or on a Broxton generation SoC with VTD enabled, i.e., when stop_machine() is then called from intel_ggtt_bind_vma(), that can potentially lead to lock inversion among reservation_ww and cpu_hotplug locks.
Detalles técnicos trazas, registros y código del informe original
[86.861179] ======================================================
[86.861193] WARNING: possible circular locking dependency detected
[86.861209] 6.15.0-rc5-CI_DRM_16515-gca0305cadc2d+ #1 Tainted: G U
[86.861226] ------------------------------------------------------
[86.861238] i915_module_loa/1432 is trying to acquire lock:
[86.861252] ffffffff83489090 (cpu_hotplug_lock){++++}-{0:0}, at: stop_machine+0x1c/0x50
[86.861290]
but task is already holding lock:
[86.861303] ffffc90002e0b4c8 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_vma_pin.constprop.0+0x39/0x1d0 [i915]
[86.862233]
which lock already depends on the new lock.
[86.862251]
the existing dependency chain (in reverse order) is:
[86.862265]
-> #5 (reservation_ww_class_mutex){+.+.}-{3:3}:
[86.862292] dma_resv_lockdep+0x19a/0x390
[86.862315] do_one_initcall+0x60/0x3f0
[86.862334] kernel_init_freeable+0x3cd/0x680
[86.862353] kernel_init+0x1b/0x200
[86.862369] ret_from_fork+0x47/0x70
[86.862383] ret_from_fork_asm+0x1a/0x30
[86.862399]
-> #4 (reservation_ww_class_acquire){+.+.}-{0:0}:
[86.862425] dma_resv_lockdep+0x178/0x390
[86.862440] do_one_initcall+0x60/0x3f0
[86.862454] kernel_init_freeable+0x3cd/0x680
[86.862470] kernel_init+0x1b/0x200
[86.862482] ret_from_fork+0x47/0x70
[86.862495] ret_from_fork_asm+0x1a/0x30
[86.862509]
-> #3 (&mm->mmap_lock){++++}-{3:3}:
[86.862531] down_read_killable+0x46/0x1e0
[86.862546] lock_mm_and_find_vma+0xa2/0x280
[86.862561] do_user_addr_fault+0x266/0x8e0
[86.862578] exc_page_fault+0x8a/0x2f0
[86.862593] asm_exc_page_fault+0x27/0x30
[86.862607] filldir64+0xeb/0x180
[86.862620] kernfs_fop_readdir+0x118/0x480
[86.862635] iterate_dir+0xcf/0x2b0
[86.862648] __x64_sys_getdents64+0x84/0x140
[86.862661] x64_sys_call+0x1058/0x2660
[86.862675] do_syscall_64+0x91/0xe90
[86.862689] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[86.862703]
-> #2 (&root->kernfs_rwsem){++++}-{3:3}:
[86.862725] down_write+0x3e/0xf0
[86.862738] kernfs_add_one+0x30/0x3c0
[86.862751] kernfs_create_dir_ns+0x53/0xb0
[86.862765] internal_create_group+0x134/0x4c0
[86.862779] sysfs_create_group+0x13/0x20
[86.862792] topology_add_dev+0x1d/0x30
[86.862806] cpuhp_invoke_callback+0x4b5/0x850
[86.862822] cpuhp_issue_call+0xbf/0x1f0
[86.862836] __cpuhp_setup_state_cpuslocked+0x111/0x320
[86.862852] __cpuhp_setup_state+0xb0/0x220
[86.862866] topology_sysfs_init+0x30/0x50
[86.862879] do_one_initcall+0x60/0x3f0
[86.862893] kernel_init_freeable+0x3cd/0x680
[86.862908] kernel_init+0x1b/0x200
[86.862921] ret_from_fork+0x47/0x70
[86.862934] ret_from_fork_asm+0x1a/0x30
[86.862947]
-> #1 (cpuhp_state_mutex){+.+.}-{3:3}:
[86.862969] __mutex_lock+0xaa/0xed0
[86.862982] mutex_lock_nested+0x1b/0x30
[86.862995] __cpuhp_setup_state_cpuslocked+0x67/0x320
[86.863012] __cpuhp_setup_state+0xb0/0x220
[86.863026] page_alloc_init_cpuhp+0x2d/0x60
[86.863041] mm_core_init+0x22/0x2d0
[86.863054] start_kernel+0x576/0xbd0
[86.863068] x86_64_start_reservations+0x18/0x30
[86.863084] x86_64_start_kernel+0xbf/0x110
[86.863098] common_startup_64+0x13e/0x141
[86.863114]
-> #0 (cpu_hotplug_lock){++++}-{0:0}:
[86.863135] __lock_acquire+0x16
---truncated---CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.19%
- Percentil entre todas las CVEs puntuadas: 8
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/20d94a6117b752fd10a78cefdc1cf2c16706048b
- https://git.kernel.org/stable/c/3dec22bde207a36f1b8a4b80564cbbe13996a7cd
- https://git.kernel.org/stable/c/4e73066e3323add260e46eb51f79383d87950281
- https://git.kernel.org/stable/c/84bbe327a5cbb060f3321c9d9d4d53936fc1ef9b
- https://git.kernel.org/stable/c/858a50127be714f55c3bcb25621028d4a323d77e
- https://git.kernel.org/stable/c/e988634d7aae7214818b9c86cd7ef9e78c84b02d
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-68244",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7d1c2618eac590d948eb33b9807d913ddb6e105f",
"lessThan": "e988634d7aae7214818b9c86cd7ef9e78c84b02d",
"versionType": "git"
},
{
"status": "affected",
"version": "7d1c2618eac590d948eb33b9807d913ddb6e105f",
"lessThan": "20d94a6117b752fd10a78cefdc1cf2c16706048b",
"versionType": "git"
},
{
"status": "affected",
"version": "7d1c2618eac590d948eb33b9807d913ddb6e105f",
"lessThan": "3dec22bde207a36f1b8a4b80564cbbe13996a7cd",
"versionType": "git"
},
{
"status": "affected",
"version": "7d1c2618eac590d948eb33b9807d913ddb6e105f",
"lessThan": "4e73066e3323add260e46eb51f79383d87950281",
"versionType": "git"
},
{
"status": "affected",
"version": "7d1c2618eac590d948eb33b9807d913ddb6e105f",
"lessThan": "858a50127be714f55c3bcb25621028d4a323d77e",
"versionType": "git"
},
{
"status": "affected",
"version": "7d1c2618eac590d948eb33b9807d913ddb6e105f",
"lessThan": "84bbe327a5cbb060f3321c9d9d4d53936fc1ef9b",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/i915/i915_vma.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.197",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.159",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.117",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.59",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.17.9",
"versionType": "semver",
"lessThanOrEqual": "6.17.*"
},
{
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/i915/i915_vma.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-16T15:15:53.650",
"references": [
{
"url": "https://git.kernel.org/stable/c/20d94a6117b752fd10a78cefdc1cf2c16706048b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3dec22bde207a36f1b8a4b80564cbbe13996a7cd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4e73066e3323add260e46eb51f79383d87950281",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/84bbe327a5cbb060f3321c9d9d4d53936fc1ef9b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/858a50127be714f55c3bcb25621028d4a323d77e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e988634d7aae7214818b9c86cd7ef9e78c84b02d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915: Avoid lock inversion when pinning to GGTT on CHV/BXT+VTD\n\nOn completion of i915_vma_pin_ww(), a synchronous variant of\ndma_fence_work_commit() is called. When pinning a VMA to GGTT address\nspace on a Cherry View family processor, or on a Broxton generation SoC\nwith VTD enabled, i.e., when stop_machine() is then called from\nintel_ggtt_bind_vma(), that can potentially lead to lock inversion among\nreservation_ww and cpu_hotplug locks.\n\n[86.861179] ======================================================\n[86.861193] WARNING: possible circular locking dependency detected\n[86.861209] 6.15.0-rc5-CI_DRM_16515-gca0305cadc2d+ #1 Tainted: G U\n[86.861226] ------------------------------------------------------\n[86.861238] i915_module_loa/1432 is trying to acquire lock:\n[86.861252] ffffffff83489090 (cpu_hotplug_lock){++++}-{0:0}, at: stop_machine+0x1c/0x50\n[86.861290]\nbut task is already holding lock:\n[86.861303] ffffc90002e0b4c8 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_vma_pin.constprop.0+0x39/0x1d0 [i915]\n[86.862233]\nwhich lock already depends on the new lock.\n[86.862251]\nthe existing dependency chain (in reverse order) is:\n[86.862265]\n-> #5 (reservation_ww_class_mutex){+.+.}-{3:3}:\n[86.862292] dma_resv_lockdep+0x19a/0x390\n[86.862315] do_one_initcall+0x60/0x3f0\n[86.862334] kernel_init_freeable+0x3cd/0x680\n[86.862353] kernel_init+0x1b/0x200\n[86.862369] ret_from_fork+0x47/0x70\n[86.862383] ret_from_fork_asm+0x1a/0x30\n[86.862399]\n-> #4 (reservation_ww_class_acquire){+.+.}-{0:0}:\n[86.862425] dma_resv_lockdep+0x178/0x390\n[86.862440] do_one_initcall+0x60/0x3f0\n[86.862454] kernel_init_freeable+0x3cd/0x680\n[86.862470] kernel_init+0x1b/0x200\n[86.862482] ret_from_fork+0x47/0x70\n[86.862495] ret_from_fork_asm+0x1a/0x30\n[86.862509]\n-> #3 (&mm->mmap_lock){++++}-{3:3}:\n[86.862531] down_read_killable+0x46/0x1e0\n[86.862546] lock_mm_and_find_vma+0xa2/0x280\n[86.862561] do_user_addr_fault+0x266/0x8e0\n[86.862578] exc_page_fault+0x8a/0x2f0\n[86.862593] asm_exc_page_fault+0x27/0x30\n[86.862607] filldir64+0xeb/0x180\n[86.862620] kernfs_fop_readdir+0x118/0x480\n[86.862635] iterate_dir+0xcf/0x2b0\n[86.862648] __x64_sys_getdents64+0x84/0x140\n[86.862661] x64_sys_call+0x1058/0x2660\n[86.862675] do_syscall_64+0x91/0xe90\n[86.862689] entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[86.862703]\n-> #2 (&root->kernfs_rwsem){++++}-{3:3}:\n[86.862725] down_write+0x3e/0xf0\n[86.862738] kernfs_add_one+0x30/0x3c0\n[86.862751] kernfs_create_dir_ns+0x53/0xb0\n[86.862765] internal_create_group+0x134/0x4c0\n[86.862779] sysfs_create_group+0x13/0x20\n[86.862792] topology_add_dev+0x1d/0x30\n[86.862806] cpuhp_invoke_callback+0x4b5/0x850\n[86.862822] cpuhp_issue_call+0xbf/0x1f0\n[86.862836] __cpuhp_setup_state_cpuslocked+0x111/0x320\n[86.862852] __cpuhp_setup_state+0xb0/0x220\n[86.862866] topology_sysfs_init+0x30/0x50\n[86.862879] do_one_initcall+0x60/0x3f0\n[86.862893] kernel_init_freeable+0x3cd/0x680\n[86.862908] kernel_init+0x1b/0x200\n[86.862921] ret_from_fork+0x47/0x70\n[86.862934] ret_from_fork_asm+0x1a/0x30\n[86.862947]\n-> #1 (cpuhp_state_mutex){+.+.}-{3:3}:\n[86.862969] __mutex_lock+0xaa/0xed0\n[86.862982] mutex_lock_nested+0x1b/0x30\n[86.862995] __cpuhp_setup_state_cpuslocked+0x67/0x320\n[86.863012] __cpuhp_setup_state+0xb0/0x220\n[86.863026] page_alloc_init_cpuhp+0x2d/0x60\n[86.863041] mm_core_init+0x22/0x2d0\n[86.863054] start_kernel+0x576/0xbd0\n[86.863068] x86_64_start_reservations+0x18/0x30\n[86.863084] x86_64_start_kernel+0xbf/0x110\n[86.863098] common_startup_64+0x13e/0x141\n[86.863114]\n-> #0 (cpu_hotplug_lock){++++}-{0:0}:\n[86.863135] __lock_acquire+0x16\n---truncated---"
}
],
"lastModified": "2026-06-17T09:58:47.840",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}